I pulled a relay box from a ford truck at the JY. The relays have 5 studs, 85, 86, 87, 30, and 87a. What does 87a do? Also it has some smaller relays, that are half the size, and they have a stud pattern like this:
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They are numbered 1-5 instead of 85-87, 30, but from looking at the side they have the same scematic on them with different numbers. Can I use these smaller relays the same way os the larger ones?